A 33-year-old woman at 33+5 weeks has a blood pressure of 168/112 mmHg on two occasions despite oral treatment. She has persistent right upper quadrant pain; platelet count is 82 × 10^9/L (150–400) and alanine aminotransferase is 126 U/L (5–40). The fetal cardiotocograph is reassuring and the fetus is cephalic with an estimated weight on the forty-fifth centile. Which one of the following is the most appropriate management?